If you express your answer as a chemical equation with all forms given, you would get: Mg+(g) + e- -> Mg (g)
The energy change that occurs when an electron is added to a neutral atom. This is usually exothermic. Noble Gases are excluded from this. Equation: X(element)+e-(electron)---------> X-1+ energy
Yes, that is part of the definition of electron affinity.
Sr has a relatively low electron affinity. Electron affinity is the energy change when an atom gains an electron to form a negative ion, and for strontium, this energy change is lower compared to other elements.
The halogen with the least-negative electron affinity is astatine. Electron affinity and electronegativities decreases down a group. Since astatine is the last halogen located in Group 17 as you move down the column from fluorine, it has the least negative electron affinity.
Helium has no electron affinity.
If you express your answer as a chemical equation with all forms given, you would get: Mg+(g) + e- -> Mg (g)
Among the elements listed: Highest electron affinity: Cl (Chlorine) with an electron affinity of -349 kJ/mol. Lowest electron affinity: Ar (Argon) with an electron affinity of 0 kJ/mol (inerts gases like Ar typically have low electron affinities).
The energy change that occurs when an electron is added to a neutral atom. This is usually exothermic. Noble Gases are excluded from this. Equation: X(element)+e-(electron)---------> X-1+ energy
The electron affinity of phosphorus can be represented by the process: P(g) + e- → P-(g). This equation shows the energy change associated with adding an electron to a phosphorus atom to form a phosphide ion.
Selenium has a lower electron affinity than germanium. Electron affinity is the energy released when an atom gains an electron to form a negative ion. In general, electron affinity tends to decrease as you move down a group in the periodic table, which is why selenium has a lower electron affinity than germanium.
chloline
The electron affinity of germanium is considered to be moderate. Germanium is a metalloid element with an electron affinity that falls between that of metals and nonmetals.
a) I(g) + e → I-(g)b) I2(g) → 2I(g) c) I(g) → I+(g) + ed) Na(g) + I(g) → NaI(s)e) Na(s) + 1/2I2(s) → NaI(s)The correct answer out of these choices is clearly a) I(g) + e → I-(g). That is the right answer.
Yes, that is part of the definition of electron affinity.
The electron affinity of sulfur is -200 kJ/mol.
Chlorine has a negative second electron affinity because it releases energy when gaining an additional electron. This makes it less likely to accept a second electron compared to its first electron affinity, which is positive.